Pakistan's Prime Minister Shehbaz Sharif said on Monday a ceasefire between the United States and Iran was "holding" and that efforts were underway to reach an agreement after weekend talks failed to do so.

Pakistani, Egyptian and Turkish mediators will continue talks with the U.S. and Iran in the coming days in an effort to bridge the remaining gaps and reach a deal to end the war, a regional source and a U.S. official told U.S. news portal Axios.

U.S. President Donald Trump said Sunday he does not care if Iran comes back to negotiations with the United States after talks in Pakistan failed to produce a deal.

"I don't care if they come back or not. If they don't come back, I'm fine," Trump told reporters at Joint Base Andrews in Maryland, upon his return from Florida.

Pope Leo XIV on Monday began a landmark visit to Algeria in the first trip to the Muslim-majority country by a pontiff.

Pope Leo XIV on Monday said he had "no intention to debate" with Donald Trump, after the U.S. president criticized him over his comments on the U.S.-Iran war.

Turkey's foreign minister said on Monday he believed Iran and the United States are "sincere" about reaching a ceasefire despite the failure of Pakistan-mediated talks on the weekend.

Iran and the United States failed to strike a deal Sunday to end the war in the Middle East, but there was no immediate return to hostilities and world leaders quickly urged both sides to pursue the diplomatic route to peace.

U.S. President Donald Trump on Sunday ordered a U.S. naval blockade of the Strait of Hormuz in response to Iran's "unyielding" refusal to give up its nuclear ambitions during peace talks in Islamabad.

While acknowledging that the marathon negotiations in Pakistan had gone "well" and "most points were agreed to," Trump said Tehran had refused to concede on the issue of its nuclear program.

Pakistan's foreign minister insisted on Sunday Washington and Tehran must uphold a ceasefire agreement, after marathon talks between the two sides to end the war in the Middle East ended without an agreement.

Iran's foreign ministry said no one had held any expectation that talks with the United States could have reached an agreement within one session after the negotiations in Islamabad stalled on Sunday.